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Finding the Fourth Proportional to 13,958.30, 20,920.41 and 6,552.87

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Solution

The fourth proportional to 13,958.30, 20,920.41 and 6,552.87 is: 9,821.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,958.30 : 20,920.41 = 6,552.87 : x
  2. Step 2: Convert to fraction form
    13,958.30/20,920.41 = 6,552.87/x
  3. Step 3: Cross multiply
    13,958.30x = 20,920.41 × 6,552.87
  4. Step 4: Simplify right side
    13,958.30x = 137,088,727.08
  5. Step 5: Solve for x
    x = 137,088,727.08/13,958.30
  6. Step 6: Final answer
    x = 9,821.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.